Abstract: The invention relates to a process and a device for determining operating characteristics of a cylinder (1) in a combustion engine in which each cylinder is provided with an intake duct (4) for the air/fuel mixture which is equipped with a member (5) for controlling the flow rate of the said mixture and which opens into the cylinder via an inlet port (6), a pressure sensor (11) being connected to the said intake duct between the control member and the port (6); the pressure sensor (11), which is independent of the components to be monitored, is used to detect in continuous fashion the pressure in the intake duct (4) between the control member (5) and the port (6); this pressure is converted in continuous fashion into an analog electrical signal representative of the pressure and of its variations; and this electrical signal is processed (in 12) in such a way as to obtain at least one desired operating characteristic of the cylinder.